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United States Patent | 5,619,160 |
Sirito-Olivier ,   et al. | April 8, 1997 |
The invention relates to a control circuit for setting a .DELTA.Vbe/R bias source at stand-by from a stand-by control signal including circuitry for virtually modifying, as a function of the state of the stand-by control signal, the emitter surface area of at least one of the matching-pair current mirror bipolar transistors in the bias source.
Inventors: | Sirito-Olivier; Philippe (Grenoble, FR); Majoux; Bernard (Meylan, FR) |
Assignee: | SGS-Thomson Microelectronics S.A. (Saint Genis Pouilly, FR) |
Appl. No.: | 493753 |
Filed: | June 22, 1995 |
Jun 27, 1994[FR] | 94 08120 |
Current U.S. Class: | 327/530; 323/315; 327/544 |
Intern'l Class: | G05F 001/10 |
Field of Search: | 327/108,530,541,543,540,542,403,404,405,544 323/315,312 |
4361815 | Nov., 1982 | Schade, Jr. | 330/254. |
4442398 | Apr., 1984 | Bertails et al. | 323/315. |
4496425 | Jan., 1985 | McKenzie | 327/542. |
4616142 | Oct., 1986 | Upadhyay et al. | 327/405. |
4792750 | Dec., 1988 | Yan | 323/315. |
4890052 | Dec., 1989 | Hellums | 323/315. |
4978905 | Dec., 1990 | Hoff et al. | 323/314. |
5404096 | Apr., 1995 | Thiel | 323/312. |
5440258 | Aug., 1995 | Galbi et al. | 327/541. |
IEEE Journal of Solid-State Circuits, vol. SC-21, no. 6, Dec. 1986, New York, US, pp. 901-908 Fisher et al., "A 50-Mbit/s CMOS Optical Transmitter Integrated Circuit". |